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प्रश्न
What is pollination?
What is meant by pollination?
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उत्तर
Pollination is the transfer of pollen grains from the male part of a flower, the anther, to the female part, the stigma. This process is crucial for fertilization, leading to the development of seeds and fruits and ensuring the plant species survival.
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संबंधित प्रश्न
How does fertilisation occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilisation.
A student has to perform the experiment "To identify the different parts of an embryo of a dicot seed." Select from the following an appropriate group of seeds:
(a) Pea, gram, wheat
(b) Red kidney bean, maize, gram
(c) Maize, wheat, red kidney bean
(d) Red kidney bean, pea, gram
The anther contains ______.
Explain what you understand by sexual reproduction.
The process of fusion of the male and female gametes is called ______.
What is the function of a flower?
What is the name of female organ of a flower (other than carpel)?
Fill in the following blank with suitable word :
The.......... at the base of the carpel contains egg cells.
Draw a neat sketch of the stamen of a flower. Mark in it filament and anther.
Explain the term 'fertilisation'.
Name the part of a seed which grows into shoot.
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
The part of a seed which grows and develops into root on germination is :
(a) cotyledon
(b) plumule
(c) follicle
(d) radicle
Fill in the blank by selecting suitable word:
A flower bearing only male or female parts is known as __________ flower.
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
Fill in the blank:
Seeds are formed from________.
Mention the function of Flower.
Write one main difference between asexual and sexual mode of reproduction. Which species is likely to have comparatively better chances of survival – the one reproducing asexually or the one reproducing sexually? Give reason to justify your answer.
Draw a diagram of the longitudinal section of a flower exhibiting germination of pollen on stigma and label (i) ovary, (ii) male germ-cell, (iii) female germ-cell and (iv) ovule on it.
Which of the following is not an unisexual flower?
a) Coconut
b) Papaya
c) Gulmohor
d) Maize
A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope
Answer the following question.
List two agents of pollination?
Find an odd one out.
Find an odd one out.
Give scientific reason.
Flower is a structural unit of sexual reproduction in plants.
Give scientific reason.
Fertilization in plants is called double fertilization.
Explain the sexual reproduction process in plants with a diagram.
Observe the figure below. Write functions of the labelled parts.
The essential parts of a flower are ______.
Write the events involved in the sexual reproduction of a flowering plant.
Discuss the first event and write the types.
The anther wall consists of four wall layers where ______
Generally, in a pollen tube, which of the following moves to the tip of the tube?
Which type of development is observed in male gametophytes of plants?
Sperm and egg nuclei fuse due to ______.
The seed that contains the future plant is called the ______
In human beings, fertilization occurs in the ______
Which among the following statements are true for sexual reproduction in flowering plants?
- It requires two types of gametes
- Fertilisation is a compulsory event
- It always results in formation of zygote
- Offspring formed are clones
Give reason for the following:
Fertilization cannot take place in flowers if pollination does not occur.
Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages?
Where is the zygote located in the flower after fertilization?
Double fertilization is essential for formation of ______.
In flowering plants, the pollen grains are transferred to stigma by pollination but the female germ cells are present in the ovary.
Explain with the help of a labelled diagram (only concerned parts), how the male germ cell reaches the ovary.
Consider the following three flowers namely X, Y and Z. Which flower(s) would develop into a fruit?
| Flower X | Flower Y | Flower Z |
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